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Capstone receives microturbine order for California wastewater biogas project

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US-based Capstone Turbine Corporation has received an order for an 800 kilowatt (kW) Signature Series microturbine to upgrade the City of Roseville, California wastewater treatment plant (WWTP).

Capstone's low-emission C800S microturbine system will allow the City of Roseville to yield "significant benefits" for customers and the environment in the near and long-term, according to the company. The regional WWTP will help officials to meet efficiency and sustainability goals by drastically reducing carbon emissions, equivalent to what can be stored by 2,100 acres of forest, as well as producing enough green power equal to power 740 homes.

Darren Jamison, president and CEO of Capstone, said: "This order is significant as it shows the continued expansion of the biogas sector in the US.

"Global wastewater treatment projects and other biogas to energy projects like landfills and breweries continue to grow and today make up 15% of our total revenue for the nine months ended 31 December 2019, compared to only 8% in the same period last year."

The company's microturbine systems can operate on biogas and other renewable fuels to produce clean and efficient electricity and thermal energy. "Capstone microturbines meet strict emissions regulations with minimal renewable fuel processing to provide firm 24/7 renewable power, a major need for grid support in California," said Kenda Brown, president at Cal Microturbine.

"Cal Microturbine sees continued growth in the renewable market as clients move to make beneficial use of biogas."

The upgrading project at the City of Roseville's WWTP will also allow officials to build a waste-to-energy co-generation plant to produce electricity for on-site use. A five-bay C800 Signature Series microturbine will provide a "long-term, scalable solution" for the project and can be expanded in future to accommodate an increase in site loads.

The 800kW Capstone system is expected to be delivered in December. The WWTP will utilise minimally-processed digester methane for use in the system, while waste heat will be recovered for digester heating.